another picture shows the muddy water forming a big puddle in the middle of the intersection. >>> in napa county three farm workers went to the hospital after they were exposed to pesticides. janine de la vega . jana katsuyama tells us that the two were taken to the hospital. >> reporter: a napa county sheriff's captain says they got the call about 9:30 this morning. the workers had been pruning a vineyard. napa officials say it appears a neighboring vineyard had applied pesticides overnight. >> there was enough breeze to cause a drift of this spray. >> reporter: the sheriff's office says the three women and a fourth worker had respiratory problems. investigators tell us the chemicals involve include sylgart, flint and altacore. >> we're in a quarantine area and we're trying to eradicate the moth. that's what altacore is all about. >> whether it's handling, understanding the labeling, understanding the mixing and being very cautious about the weather and the time of application. >> reporter: there's no word on just how long this investigation will take. the farm bureau says there are